Piston-ring remover



C. D. STEVENS.

PISTON RING REMOVER. APPLICATION FILED JUNE 1, 1919.

Patented Feb. 10, 1920.

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CHARLES D. STEVENS, 0F FREEPORT, NEW YORK.

PISTON-RING REMOVER.

Specification of Letters Patent.

Patented Feb. 10, 1920.

Application filed June 7, 1919. Serial No. 302,394.

To all whom it may concern:

Be it known that I, CHARLES D. STEVENS, a citizen of the United States, and a resident of Freeport, in the county of Nassau and State of New York, have invented a new and Improved Piston-Ring Remover, of which the following is a full, clear, and exact description.

This invention relates to piston ring removers and has for an object to provide an improved construction which will engage a ring, spread the same and hold the ring in a spread condition while it is being removed.

Another object in view is to provide a piston ring remover in which a plier construction is utilized for spreading and supporting a ring while being removed.

A further object of the invention is to provide an improved plier construction for removing and applying piston rings, the same being provided with a jaw structure for engaging the rings in such a manner that upon the operation of the pliers the jaws will be separated and the ends of the ring therewith and held in a separated condition while being manipulated.

In the accompanying drawings:

Figure 1 is a side view of a piston ring remover embodying the invention, certain parts thereof being broken away for better illustrating the construction.

Fig. 2 is a fragmentary sectional view through Fig. 1 on line 2-2.

Fig. 3 is an edge view of the jaw end of the pliers shown in Fig. 1.

Fig. 4 is a plan view of a slightly modified form of ring engaging plate.

Fig. 5 is a side view on a reduced scale of one end of a ring remover shown in operative position and, arranged with certain parts broken away.

Fig. 6 is a sectional view through Fig. 5 on line 6-6.

Fig. 7 is a top plan view of the ring and associate parts shown in Fig. 5 with ring spreading members in position.

Fig. 8 is a View similar to Fig. 7, but showing a differently constructed ring.

Fig. 9 is an end view of the jaws of the pliers shown in Fig. 1.

Referring to the accompanying drawing -by numerals, 1 indicates a pair of pliers formed to act as means for removing or applying a piston ring, whlle 2 lndicates a piston ring and 3 a piston as indicated in Fig. 5. The pliers 1 are pivotally connected together at 4 in such a manner that when the handles 5 and 6 are pressed toward each other the jaws 7 and 8 will open. A spring 9 acts on the handles 5 and 6 for normally holding them open while an adjustable stop 10 is provided for limiting the closing movement of the handles 5 and 6 and consequently the movement of the jaws 7 and 8. Jaws 7 and 8 are provided with grooves on the adjacent faces for receiving the" plates 11 and 12, which plates having projecting pins 13 and 14: and slots 15 and 16 adapted to receive suitable clamping grooves. These slots are arranged longitudinally of the jaws so that the pins 13 and 14 may be moved inwardly or outwardly as desired to accommodate the different makes of piston rings. On each jaw, as shown in Figs. 3 and 9 there is provided a pair of retaininghook-shaped members 17 and 18, said members being provided with suitable slots 19 and 20 accommodating the clamping screws 21 and 22. The hook members 17 and 18 extend over, particularly as shown in Fig. 9, so that when the ends of the piston ring 2 strike against the pins 13 and 1% the side walls of the piston ring will strike against the overhanging portions of the hook members 17 and 18. When the parts are arranged in this position, as shown in Fig. 9, the handles 5 and 6 may be moved together and the jaws spread as shown in Fig. 5, whereupon the ring 6 will also be spread and may be easily removed. A new ring may be applied by a reverse operation of the parts.

As indicated in Fig. 8 the pins 13 and 1 1 may be used for a different style of ring, and when used for this different style of ring the modified form of plate 12 is provided in which the pin 14 is offset to one side so as to properly fit one of the notches in the rim It will be observed that the plates 11 and 12 are adjustable longitudinally of the jaws 7 and 8 while the hook-shaped members 17 and 18 are adjustable laterally so as to take in wide or narrow piston rings.

In operation when it is desired to remove the piston ring, similar to piston ring 2, said ring is engaged by the hand of the operator and pushed toward the piston so that the part where the ring is opened will be raised somewhat above the piston. This will allow the pins 18 and 14 to freely engage the ends of the piston ring while the hook-shaped members 17 and 18 engage the sides of the ring. After the parts have been engaged and spread as shown in Fig. 5 the ring and the pliers are then moved longitudinally of the piston until the ring is completely disconnected.

VVhat I claim is:

1. A piston ring remover comprising a pair of jaws, means for moving the jaws apart and holding the same apart when in operation, a pair of plates connected to the inner faces of said aws formed with projecting pins, each of said plates being formed with a slot, a securing screw extending through said slots whereby the plates may be adjusted, and a pair of hook-shaped members connected to the outer face and overhanging the end of each of said jaws, said hook-shaped members being adjustable toward and from each other in a direction substantially at right angles to the adjustment of said plates.

2. A piston ring remover comprising a pair of pliers formed so that when the handles are closed the jaws will be opened, a pin connected with each of said jaws on the inner face, said pins being adjustable axially of the jaws so as to project any desired distance beyond the end of the jaws, and a stop extending from each side of each jaw.

3. A piston ring remover comprising a pair of pliers arranged so that when the handles are moved together the jaws will move apart, a pair of pins adjustable axially of the jaws secured to the inner face thereof, and a pair of stops secured to each of said jaws arranged with a section extending along each lateral edge of the jaws, said stops being adjustable toward and from each other.

CHARLES D. STEVENS. 

